A Standard Carrier Alpha Code is a unique two to four letter code used to identify transportation companies and was created to facilitate the computerization of the transportation industry. It is also used to verify that trucking companies have the proper insurance to enter the terminal. Once a company is set up in the terminal system with the appropriate SCAC code, the trucking company is registered. This will cut out any unnecessary wait time incurred when a transportation company does not have the proper identification set up prior to entry at the terminal.